The Shimano Deore RD-M6200 rear derailleur is based around the traditional clutch-style chain stabilizer; it weighs just 360 grams and is the most affordable 12-speed Shimano derailleur available. It features a steel pulley cage and HYPERGLIDE+ for fast shifting even under load.Shadow RD+ traditional clutch-style chain stabilizer reduces chain slap for a quiet ride and efficient shiftsBecause of its low profile and single tension construction the derailleur doesn&';t hit the chain stay in rough riding conditionsSteel pulley cage adds extra strength and durability to the designLong Cage is compatible with all HG+ 10-51t 12-speed cassettes (sold separately)Requires HG 12-speed compatible chain (sold separately) TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Largest Cog 51 Rear Der/Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 12 Chain Wrap Capacity (teeth) 41 Cage Length Long Color Black